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Published byPamela Washington Modified over 8 years ago
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By: Maureen Cop
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A matrix is a rectangular array of numbers arranged by rows and columns. The numbers inside a matrix are called elements. The numbers arranged vertical are called columns, and the numbers arranged horizontal are called rows.
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Adding MatricesSubtracting MatricesScalar Multiplication
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Adding matrices is very similar to adding real numbers.
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Subtracting matrices is very similar to subtracting real numbers.
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The real number that is being multiplied by a matrix is called a scalar. In this example, the scalar is 2. In scalar multiplication, every number in the matrix is multiplied by the scalar.
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A company manufactures small and large steel DVD racks with wooden bases. Each size of rack is available in three types of wood: walnut, pine, and cherry. Sales of the racks for last month and this month are shown below: Large Rack Sales: Small Rack Sales:
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Here is one way we can organize the manufacturing data from last month into a matrix: Walnut Pine Cherry Large Racks Small Racks The columns represent the three types of wood and the the rows represent the large and small racks.
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Matrices in Wikipedia Matrix Addition in Wikipedia Matrix Addition in Wikipedia Cool Math Matrix Practice Websites Used for Images:Websites For Fun and Practice:
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I hope you liked this lesson on the basic matrix operations and how real life data can be organized into matrices!
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